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Persistence of slow fluctuations in the overdoped regime of Ba(Fe1-xRhx)(2)As-2 superconductors

TitlePersistence of slow fluctuations in the overdoped regime of Ba(Fe1-xRhx)(2)As-2 superconductors
Publication TypeJournal Article
Year of Publication2016
AuthorsBossoni, L, Moroni, M, Julien, MH, Mayaffre, H, Canfield, PC, Reyes, A, Halperin, WP, Carretta, P
JournalPhysical Review B
Volume93
Pagination224517
Date Published06
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000378305600003
Keywordsdiffusion, field, iron-based superconductors, locking, nmr, nuclear-magnetic-resonance, physics, solids, spin-echo decay, stripe order, transition
Abstract

= 1 MHz) spin fluctuations persist into the overdoped regime of Ba(Fe1-xRhx)(2)As-2 superconductors. Measurements of the As-75 spin echo decay rate, obtained both with Hahn Echo and Carr Purcell Meiboom Gill pulse sequences, show that the slowing down of spin fluctuations can be described by short-range diffusive dynamics, likely involving domain walls motions separating (pi/a, 0) from (0, pi/a) correlated regions. This slowing down of the fluctuations is weakly sensitive to the external magnetic field and, although fading away with doping, it extends deeply into the overdoped regime.

DOI10.1103/PhysRevB.93.224517
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Complex States

Alternate JournalPhys. Rev. B